Evolutionary signatures of a trade-off in direct and indirect defenses across the wild grape genus, Vitis
Evolutionary signatures of a trade-off in direct and indirect defenses across the wild grape genus, Vitis
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野生葡萄属葡萄属直接和间接防御权衡的进化特征
DOI：
10.1093/evolut/qpad140
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发表时间：
2023
期刊：
影响因子：
3.3
通讯作者：
Connallon, ed., Tim
中科院分区：
文献类型：
--
作者：
Graham, Carolyn D. K.;Forrestel, Elisabeth J.;Schilmiller, Anthony L.;Zemenick, Ash T.;Weber, Marjorie G.;Kronforst, ed., Marcus;Connallon, ed., Tim
化学防御与共生保镖保护之间的进化相关性早已被预测，但对这些模式的测试仍然很少。我们使用系统发育框架来测试野生葡萄属 33 个物种中以植物次生代谢形式的直接防御和以叶 domatia 形式的间接防御之间的权衡或协同作用的进化相关性。我们还对普通食草动物进行了生物测定，将我们的化学表型与食草动物的适口性联系起来。最后，我们测试了防御性状是否与每个物种当代范围的平均非生物特征相关，以及这些相关性是否与植物防御理论一致。我们发现，在整个属的葡萄叶组织中，多马蒂亚大小和次生代谢物的多样性之间存在负进化相关性，而且具有较高多样性和次生代谢物丰富度的叶子对于通才草食动物来说不太适口，这与化学和互惠防御投资的权衡一致。植物防御理论的预测没有得到防御表型投资与非生物变量之间关联的支持。我们的工作展示了一种进化模式，表明整个葡萄属的间接和直接防御策略之间的权衡。
Evolutionary correlations between chemical defense and protection by mutualist bodyguards have been long predicted, but tests of these patterns remain rare. We use a phylogenetic framework to test for evolutionary correlations indicative of trade-offs or synergisms between direct defense in the form of plant secondary metabolism and indirect defense in the form of leaf domatia, across 33 species in the wild grape genus,Vitis. We also performed a bioassay with a generalist herbivore to associate our chemical phenotypes with herbivore palatability. Finally, we tested whether defensive traits correlated with the average abiotic characteristics of each species’ contemporary range and whether these correlations were consistent with plant defense theory. We found a negative evolutionary correlation between domatia size and the diversity of secondary metabolites inVitisleaf tissue across the genus, and also that leaves with a higher diversity and richness of secondary metabolites were less palatable to a generalist herbivore, consistent with a trade-off in chemical and mutualistic defense investment. Predictions from plant defense theory were not supported by associations between investment in defense phenotypes and abiotic variables. Our work demonstrates an evolutionary pattern indicative of a trade-off between indirect and direct defense strategies across theVitisgenus.